Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Onde foram os Torneios de Grand Slam de 2009 e 2011?
 ###Tabelas: CREATE TABLE season_4:_2001-2002 (season_4:_2001-2002_id AUTO_INCREMENT PRIMARY KEY, Episode # INT, # in Season INT, Episode Name VARCHAR, Airdate VARCHAR, Location VARCHAR) CREATE TABLE current_bus_fleet_roster (current_bus_fleet_roster_id AUTO_INCREMENT PRIMARY KEY, Order Year INT, Fleet Series (Qty.) VARCHAR, Manufacturer VARCHAR, Model VARCHAR, Powertrain (Engine/Transmission) VARCHAR, Fuel or Propulsion VARCHAR, Division VARCHAR) CREATE TABLE 1988_boys'_team (1988_boys'_team_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Height VARCHAR, School VARCHAR, Hometown VARCHAR, College VARCHAR, NBA Draft VARCHAR) CREATE TABLE doubles_performance_timeline (doubles_performance_timeline_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, 2008 VARCHAR, 2009 VARCHAR, 2011 VARCHAR, 2012 VARCHAR, 2013 VARCHAR) CREATE TABLE council_composition (council_composition_id AUTO_INCREMENT PRIMARY KEY, Party VARCHAR, Previous council INT, Staying councillors INT, Seats up for election INT, Election result INT, New council INT)  
SELECT 2011 FROM doubles_performance_timeline WHERE 2009 = grand slam tournaments